Get The Most Of Your VoIP System By Following These Simple Security Protection Tips

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Many small businesses, as well as big international companies have adopted VoIP technology and have started enjoying all the benefits it has to offer. Few, however, take VoIP security issues seriously enough and implement necessary protection measures. We have already talked about Asterisk security in this post. Here, we’d like to add a few general […]

May 28, 2015 / By Sasha

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Asterisk (important) Security Tips

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It is no secret that IP PBX systems are a hot target these days by attackers in order to get steal free phone calls at your expense. It is therefore important to make sure your system is secure. Remember: Security is a process, not a product. — Bruce Schneier There are many articles out there […]

May 16, 2013 / By Tom

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How to Avoid G711<->G729 Transcoding CPU Penalty

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g711u(/a, aka ulaw/alaw) is a free codec with the highest voice quality and low CPU costs, but it consumes high bandwidth. g729a is a low bandwidth codec but has high CPU penalty, because of that many voice broadcast (and similar) systems avoid g729a – but that’s a mistake. There are many blogs out there that […]

April 25, 2013 / By Tom

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Understanding Asterisk Failover SIP Peers: Part 1

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When running a call-center setup where you strive to be 100% available at all times, it is important not to assume that your PBX, Internet links or even VoIP carrier will be 100% reliable. In this post, we will try to explain why it’s important to have multiple SIP peers and to use a secondary […]

September 7, 2012 / By Tom

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Wanna know SIP? Read the RFC!

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When I first configured Asterisk a few years back, it took me a lot of time to set it up properly because of many technical issues I experienced: echo, jitter, authentication issues, caller id problems, IAX vs. SIP (Pick SIP), NAT, dial plan and what not. From Wikipedia: In computer network engineering, a Request for […]

September 6, 2012 / By Tom

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